{
  "manageEntity": {
    "action": "Save",
    "entityId": "452753",
    "entityType": "Track",
    "nonce": "0x0b7e0b8bed0f7ca4f542335601623b792895e793775b216dc9e59f4b3f4d93f8",
    "signature": "0xa49aac481a327c78dfce56956b9c1431142c1ad79ffa14e889a3007e379411c13b95d4100ce7446ea35906582f07824ee3c6d7c1dd16a1dbd4662b51940c78411c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}